There is a map with the same name in the steam workshop LoL

Hey bud, sucks about your map. I think it makes auto backups of your map file regularly. Check out:

D:\SteamLibrary\steamapps\common\Call of Duty Black Ops III\radiant\autosave_backup

This might be different, for example the drive and the path to steam. Most likely: C:\Program Files\Steam\Steamapps\common\...

Hopefully this helps

For some reason I forgot about thank you, i did it and it worked (the same day you posted it xD)

How can I make that the weapons can only be taken one time?

Actually I don't know exactly where this post goes, but since I can't open my map in radiant I guess that scripting help is the place.
Today I started to make some changes to my map (it's called zm_outofnamesideas), everything was going fine, but I decided to change some things. So I tried to make that building the shield gives you a ray gun mark 3 (I changed the KVP of the prefab of the shield). Then, I compiled and linked my map, after that I ran the map to try it, but it didn't started (the error was "Could not load level fastfile"). So I decided to check the scripting and those things, everything was fine, so I started to compare with a zm default map the giant boxes (fps tool, volume sun,...), I noticed something weird with my volume box so I checked the KVP values, and I changed by mistake the size of the box so I pressed ctrl+z, but the radiant tool stoped working and this error appeared in screen:

(!s_mapIsLoading)

C:\Program Files (x86)\Steam\SteamApps\common\Call of Duty Black Ops III\bin\radiant_modtools.exe
..\..\src\effectscore\fx_glue_material.cpp:264

Now I can't open my map, so if anyone can help me please do it, I don't want to lose 60 hours because I'm so dumb that I don't make backups.
Thanks.
Sorry about my english, I'm not native speaker, if you don't understand something, ask me and I will explain myself.